Median sternotomy provides excellent exposure for excising anterior mediastinal tumors in children

Abstract

Median sternotomy (M-S) provides excellent exposure and allows dissection of the medial side of an anterior mediastinal tumor (AMT) with minimal risk. We report our experience of resecting AMT using M-S. Five children with AMT were treated using M-S between 1997 and 2004 at our institute. Ages at M-S ranged from 8 months (case 2) to 9 years (case 1) and AMT ranged in size from 5×6×7 cm³ (case 2) to large enough to occupy nearly the entire right thoracic cavity (cases 4 and 5). AMT were resected completely in all cases through M-S with the patient in the supine position. M-S alone was used in cases 1, 2, and 3, and cases 4 and 5 required additional incisions. There were dense adhesions between AMT and important mediastinal structures such as the anterior part of the pericardium (cases 1 and 2), left phrenic nerve (case 3), and pulmonary vessels (case 4, 5), but all were dissected safely under direct vision. There was no respiratory or cardiovascular compromise during M-S due to compression of the healthy lung and mediastinum. Histopathologic findings were mature teratoma in cases 1, 3, and 5, immature teratoma in case 2, and pleuropulmonary blastoma in case 4. Postoperative recovery was unremarkable. After mean follow-up of 3.4 years, cases 1, 2, 3, and 5 are currently well with no signs of recurrence, but case 4 died from disseminated intravascular coagulation during postoperative chemotherapy for massive local tumor recurrence 6 months after surgery. Based on our experience, M-S allows access to all aspects of AMT under direct vision, and provides excellent exposure, thus facilitating complete resection.